Pine chafer

The pine chafer (Polyphylla fullo) is a large beetle belonging to the Scarabaeidae family. It is easily identified by its marbled appearance consisting of white scales on a dark brown body. This insect is widely recognized as a major pest in both forest nurseries and commercial orchards.

This species primarily targets conifers, vineyards, and various hardwood fruit trees. While adult beetles cause visible damage by defoliating trees and feeding on pine needles, the most destructive stage is the larval phase, as the grubs feed extensively on the root systems of young plants.

The life cycle of the pine chafer is extensive, often spanning up to four years from egg to adult. The larvae reside deep in the soil, moving vertically depending on temperature and moisture. Adults typically emerge in early summer, often appearing in large numbers during warm evenings to feed and reproduce.

Damage caused by larvae is often hidden until the plant shows signs of severe stress or death. The grubs sever roots, preventing the plant from absorbing water and nutrients. In nurseries, this can lead to the loss of entire batches of seedlings, significantly impacting crop productivity and financial stability.

Effective control requires a multi-faceted strategy. Cultural practices, such as deep soil cultivation, can expose larvae to natural predators. Chemical control involves the application of specialized soil insecticides, while biological options include the use of entomopathogenic fungi or nematodes to reduce population density.

• Soil cultivation
• Insecticide application
• Biological pest control
• Monitoring beetle flight
• Seedling protection